Use mojang item ids for alternative item despawn rate (#6997)

patches/server/0867-Force-close-world-loading-screen.patch

@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <jahnke.nassim@gmail.com>
+Date: Wed, 2 Mar 2022 09:45:56 +0100
+Subject: [PATCH] Force close world loading screen
+
+Dead players would be stuck in the world loading screen and other players may
+miss messages and similar sent in the join event if chunk loading is slow.
+Paper already circumvents falling through the world before chunks are loaded,
+so we do not need that. The client only needs the chunk it is currently in to
+be loaded to close the loading screen, so we just send an empty one.
+
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 1f221b5451004093af6e46b65b9e60499a12b5ad..8d4b8025a158b71b87682a67fb67e7fcbf0bd6c2 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
++++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -422,6 +422,13 @@ public abstract class PlayerList {
+ 
+         // Paper start - move vehicle into method so it can be called above - short circuit around that code
+         onPlayerJoinFinish(player, worldserver1, s1);
++        // Send empty chunk, so players aren't stuck in the world loading screen
++        net.minecraft.core.Holder<net.minecraft.world.level.biome.Biome> plains = worldserver1.registryAccess().registryOrThrow(net.minecraft.core.Registry.BIOME_REGISTRY)
++            .getHolderOrThrow(net.minecraft.world.level.biome.Biomes.PLAINS);
++        player.connection.send(new net.minecraft.network.protocol.game.ClientboundLevelChunkWithLightPacket(
++            new net.minecraft.world.level.chunk.EmptyLevelChunk(worldserver1, player.chunkPosition(), plains),
++            worldserver1.getLightEngine(), null, null, true, false)
++        );
+     }
+     private void mountSavedVehicle(ServerPlayer player, ServerLevel worldserver1, CompoundTag nbttagcompound) {
+         // Paper end